Portable speaker



FIG. 1 is a top, front and right side perspective view of a first embodiment of a portable speaker, embodying my new design;

FIG. 2 is top plan view;

FIG. 3 is a front elevation view, the rear and right side elevation views being identical;

FIG. 4 is a left side elevation view;

FIG. 5 is a bottom plan view;

FIG. 6 is a top, front and right side perspective view of a second embodiment thereof;

FIG. 7 is a top plan view;

FIG. 8 is a front elevation view;

FIG. 9 is a right side elevation view;

FIG. 10 is a left side elevation view;

FIG. 11 is a bottom plan view;

FIG. 12 is a top, front and right side perspective view of a third embodiment thereof;

FIG. 13 is a top plan view;

FIG. 14 is a front elevation view, the rear, right and left side elevation views being identical; and,

FIG. 15 is a bottom plan view.

The broken lines shown are included for the purpose of illustrating portions of the portable speaker that form no part of the claim. 

CLAIM The ornamental design for an portable speaker, as shown and described. 